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Differential D3899

Properly set the return value for casueword to 0 upon success.
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Authored by ed on Oct 15 2015, 8:40 AM.
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andrew
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rS289373: Properly set the return value for casueword to 0 upon success.
Summary

While trying to get multithreading working for CloudABI on aarch64, I
noticed that compare-and-exchange operations in kernelspace would always
fail. It turns out that we don't properly set the return value to 0 when
the compare and exchange succeeds.

Test Plan

The unit tests for CloudABI's C library now pass.

Diff Detail

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rS FreeBSD src repository - subversion
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Event Timeline

ed updated this revision to Diff 9404.Oct 15 2015, 8:40 AM
ed retitled this revision from to Properly set the return value for casueword to 0 upon success..
ed updated this object.
ed edited the test plan for this revision. (Show Details)
ed added a reviewer: andrew.
Herald added subscribers: emaste, imp. · View Herald TranscriptOct 15 2015, 8:40 AM
andrew accepted this revision.Oct 15 2015, 5:26 PM
andrew edited edge metadata.
This revision is now accepted and ready to land.Oct 15 2015, 5:26 PM
Closed by commit rS289373: Properly set the return value for casueword to 0 upon success. (authored by ed). · Explain WhyOct 15 2015, 5:50 PM
This revision was automatically updated to reflect the committed changes.

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head/
sys/
arm64/
arm64/
2 lines

Diff 9427

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head/sys/arm64/arm64/support.S

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